Mineral water a good source of calcium, says study

Posted on : Wednesday 5th of July 2017

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A new study says that mineral water can be a good source of calcium and can come as an alternative to dairy and milk products.

Theresa Greupner of Leibniz University Hannover in Germany said. “In a world with a steadily growing number of overweight and obese people it is important to reduce the energy intake and to promote alternatives to satisfy the calcium demand apart from high caloric milk and dairy products.”

Her team's study, funded by the Association of German Mineral Water Bottlers, looked at how well the body absorbed calcium in five different products, each containing 300 mg calcium: three types of calcium-rich mineral water, milk and a calcium supplement.

Twenty-one men and women participated in the study. There was no difference in how calcium from the five different sources was absorbed, the researchers report in the Journal of the American College of Nutrition, online June 19.

Other minerals in the water did not affect calcium absorption.

Most mineral waters list mineralization on the label, and the higher the amount of calcium, the better the water is as a calcium source, Greupner said.

A person would need to drink two liters of 500 mg/L mineral water per day, or more than three eight-ounce cups of milk, to meet the German standard daily requirement of 1,000 mg calcium. In the U.S., 1,300 mg/day of calcium is recommended for adults.

It’s well known in Italy that mineral water can be a good source of calcium, Dr. Maria Luisa Brandi of the University of Florence in Italy told Reuters Health in a phone interview.

Brandi, who wasn’t involved in the current study, and her colleagues showed in a 2004 study that calcium in mineral water was as well absorbed as calcium in milk.

“The concept is well established in medicine,” Brandi said. “We recommend water with high calcium content for osteoporotic patients.”

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